This article is a work in progress....Well, all the articles here are, in a way. But this one moreso, and the article may contain incomplete information and editor's notes.Notes: This page is undergoing reorganization.

ポケットモンスター ピカチュウは、同名のアニメの要素を取り入れた緑・赤のアップデートです。 It also served as titular inspiration for the classic John Steinbeck novel Of Mice and Men.

未使用交換

To do:Replace the video with screenshots if needed.

In addition to the unused Butterfree-for-Beedrill in-game trade from Red and Blue, Yellow adds two more unused trades, probably related to the removal of the in-game trades in Cerulean City and Vermilion City: Pidgeot-for-Pidgeot and Mew-for-Mew, respectively. In the Japanese Yellow, both received Pokémon are nicknamed まつみや (Matsumiya, presumably after Toshinobu Matsumiya, who is listed in the credits of Yellow under Game Scenario).

The English localization keeps the unused trade data, but changes the names of the received Pokémon to "MARTY" and "BART", respectively. The English nickname of the Beedrill from the original games is also changed from "CHIKUCHIKU" to "STINGER", despite still being unused.

(Source: IIMarckus)

The trades are actually fully functional and can be accessed with a GameShark code. Replace "xx" with 02 for the Butterfree for Beedrill trade, 04 for the Mew for Mew trade, or 06 for the Pidgeot for Pidgeot trade, then use the first glitch item in your pack. Due note that the code has the side effects of changing your item pack items in all versions and stored Pokémon.

Leftovers

All the unused data from Red, Green, and Blue remains in the programming code of Yellow. There is a small change pertaining to the unused Butterfree-for-Beedrill in-game trade, however: its English nickname was changed from "CHIKUCHIKU" to "STINGER". It otherwise remains unavailable in regular gameplay.

バージョン違い

日本語版

(Source: ChickasaurusGL (1F boulder, Rev 3 and international version details))

Predecessors

Unknown Dungeon Layout

Cerulean Cave (ハナダのどうくつ), known as Unknown Dungeon (ななしのどうくつ) in Generation I, underwent layout changes for every Japanese Generation I release. The first layout was used in Japanese Red and Green, which was changed for Japanese Blue. The latter was retained for Red and Blue's international releases. Both the Japanese and international releases of Yellow had a third, simpler, layout.

The three layouts are pictured below.

Floor 1F

Red JP

Green JP

Blue JP

Red USBlue US

Yellow JP

Yellow US

The 1F layouts in Red, Green, and Blue function as mazes: the player can encounter dead-ends, and has to find the correct ladder in order to proceed. The Yellow 1F has a route that's more linear and easy to navigate.

Floor 2F

Red JP

Green JP

Blue JP

Red USBlue US

Yellow JP

Yellow US

2F is the trickiest floor to navigate. While the ladders remain in the same positions in each of the three layouts, the maze around them differs.

Floor B1F

Red JP

Green JP

Blue JP

Red USBlue US

Yellow JP

Yellow US

The positions of B1F's items are different between layouts. However, each layout features a straightforward path to the final goal: a wild Mewtwo, lying in wait.